Iron and steel industry is an important part of the national economy and its development is an important indicator of the level of industrialization of a country or region，with the characteristics of a long industrial chain，wide influence and obvious cumulative effects. In the early days，economists usually used steel production or per capita steel production to evaluate the level of development of a country or region’s steel industry. However，it is difficult to reflect the level of technology，resource consumption and policy support behind the industry development evaluation by a single indicator，especially in the context of the general overcapacity of steel worldwide and the tightening of carbon emission policies，production is no longer the only criterion to measure the level of development of a country or region’s steel industry. Based on theories of industrial economics，this report proposes a set of indicators for the evaluation of the steel industry development index from three aspects：development foundation，development environment and development capacity，including three primary indicators，nine secondary indicators and 22 tertiary indicators. The final data was collected to evaluate China’s steel industry development index from 2011 to 2020. The evaluation results show that China’s steel industry is developing on a stable basis，driven by a significant increase in development capacity，and the overall industry is developing in a good manner. However，the environment for the development of China’s steel industry is facing profound and complex changes under the policy of de-capacity and “double carbon target”.